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Pavlova-9 [17]
3 years ago
8

What are ionic bonds? A.Bonds that form when any two atoms come in contact .B.Chemical bonds that form from the attraction of ne

gative and positive ions .C.Chemical bonds that form when atoms share electrons equally .D.Chemical bonds that form when atoms share electrons unequally
Physics
1 answer:
Shtirlitz [24]3 years ago
3 0

Answer:

B

Explanation:

B would be the best answer because an ionic bond occurs usually between a metal and a non-metal. An electron transfer occurs in an ionic bonds because one of the atoms pulls the other atoms electrons so strongly that it basically steals it. Since electrons are negative, the atom that stole the electron become a negatively charged ion, and the one that was stolen from is positive because it has less electrons than protons (+), so they form a positive and negative ion which attract each other.

Opposite charges attract.

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How should the distance, D, between two point charges, q1 and q2, be changed to double their electric potential energy
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little/no

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8. Three grams of Bismuth-218 decay to 0.375 grams in one hour. What is the half-
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Answer: 0.333 h

Explanation:

This problem can be solved using the <u>Radioactive Half Life Formula</u>:  

A=A_{o}.2^{\frac{-t}{H}} (1)  

Where:  

A=0.375 g is the final amount of the material  

A_{o}=3 g is the initial amount of the material  

t=1 h is the time elapsed  

H is the half life of the material (the quantity we are asked to find)  

Knowing this, let's substitute the values and find h from (1):

0.375 g=(3 g)2^{\frac{-1h}{H}} (2)  

\frac{0.375 g}{3 g}=2^{\frac{-1h}{H}} (3)  

Applying natural logarithm in both sides:

ln(\frac{0.375 g}{3 g})=ln(2^{\frac{-1 h}{H}}) (4)  

-2.079=-\frac{1 h}{H}ln(2) (5)  

Clearing H:

H=\frac{-1h}{-2.079}(0.693) (6)  

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